DUST DISTRIBUTION PATTERN AND OPTIMIZATION OF TUNNEL VENTILATION SYSTEM

This paper focuses on examining the effectiveness of a long-pressure and short-pumping ventilation system in a highway tunnel construction project in China. Utilizing computational fluid dynamics theory and ventilation system design principles, the study involves numerical simulations through finite element method to analyze dust distribution within the tunnel. The research investigates the effect of the distance of the duct from the working face and pumping ratio on dust concentration. The results indicate that optimal ventilation and dust removal occur when Lpressure set at 20m, Lpumping set at 3m, and pumping ratio is 0.7, resulting in an average dust concentration of 250mg/m3. These findings offer valuable insights for designing effective ventilation systems in tunnel construction projects, thereby enhancing dust control measures to ensure a safer working environment.